Ryumon: a little koi climbs the Dragon Gate in an 88-second anime film

Create a 2D anime short for the web. It must look completely like real Japanese anime, as if it were taken directly from a finished theatrical anime film. This is traditional-looking, hand-drawn 2D anime, not a 3D animation, a moving illustration, or a stylized web graphic.

Deliver a single, self-contained HTML file that plays offline, with a synthesized soundtrack. Use any tools, libraries, references, guides, literally anything etc.

Use theatrical Japanese fantasy anime as the art style reference: painted nature, luminous water, skies that carry the emotion. It retells the old legend of the carp that climbs the Dragon Gate falls. The film is 88 seconds long, in 39 shots. Its characters are HI, the smallest koi in a temple pond, a grey HERON, a ginger CAT, an old stone dragon spout, and the white DRAGON that Hi becomes. No people appear in the film. Use any tools or techniques you want, including 3D, as long as the final result looks 100% like hand-drawn 2D anime.

SCENE
Frame one is already striking: a white dragon with red markings bursts up a chimney of storm clouds at the camera, jaw wide, lightning, two impact frames, hard cut to silence. Dawn at an autumn temple pond: a red maple leaf lands, rings spread, and a scarlet crown spot rises until Hi's big dark eye breaks the surface. Wide: maples, a red arched bridge, a stone lantern, the temple roof, mist. Underwater, big koi nudge little Hi aside. Hi gazes at the carved stone dragon pouring its stream into the pond against the sunrise; its eye turns determined. It leaps the tiny inlet cascade and leaves.
Low along a stream through dense bamboo, then from above: a red-white dot winding through green. A golden canal town; a cat swipes, Hi dodges in a smear, the cat's eyes go round. The river opens toward far mountains with one thin waterfall thread. In a sunset gorge Hi fights the rapids; a heron's yellow eye locks on. The beak spears in with a cone of bubbles; on the second strike Hi leaps over it against the sun. Dusk turns violet; rain rings seen from below.
Night storm: a colossal 300 m waterfall, lightning, ghostly koi failing. Hi leaps, climbs a third of the way and is beaten back. It sinks, eyes half closed. A warm memory of the stone dragon. Its eye opens, the crown glows; it races up from the deep, bursts out and climbs the falling water, dodges a tumbling trunk, fins ragged. Near the top, near silence; the crown ignites; the final push over the lip, and a bolt strikes it. In the lightning glow it stretches, fins become a mane, barbels whiskers, antlers sprout, a gold wave runs over the scales. The dragon roars, rockets through the clouds into a golden dawn, then flies home down the valley: the heron flees, the cat looks up in awe, the bamboo bows. It circles the temple above the stone dragon. Last: the leaf on the still pond, the dragon's reflection gliding beneath, one ripple, a hold, a fade to white-gold.

ANIME QUALITY STANDARD
Every frame must look drawn by professional anime animators and painted by master background artists.
HI: a small kohaku butterfly koi. White FAF7F2, shade B9BCD6, two big organic scarlet patches E8442E and a round scarlet crown spot, long translucent fins with drawn rays, two small barbels, big expressive anime eyes that read at phone size.
THE DRAGON: 300 m, white with the same scarlet patches and crown, drawn scale arcs, a flowing translucent mane, long whiskers, pale-gold antlers, gold claws, Hi's eye made fierce, moving in S-curves.
HERON: blue-grey 8C97AD, white face, black crest, yellow beak and eye F1C232. CAT: ginger tabby E8954A with a white chest, cute and expressive.
Line art: Confident hand-inked lines with pressure and taper, on every shape and plate boundary.
Coloring: Clean cel areas, cool lavender shadows, crisp highlights. Never murky or black: the storm night is deep indigo 1E2453 with cyan-white water.
Backgrounds: Hand-painted gouache: maples and a temple at dawn, bamboo, a golden canal town, sunset cliffs, a storm waterfall, a dawn sea of clouds.
Water: Clear and luminous: depth bands, caustics, drawn ripple rings, reflections, a bright surface seen from below.
Effects: Bold drawn FX on threes: rain, spray, splash crowns, bubbles, lightning, sparkles, speed lines, inverted ink impact frames. Never particle mush.
Animation: Characters on twos, strong key poses, real holds, smears on fast moves. The huge dragon moves slowly. Nothing clips, slides or floats.
Sound: Original score and effects timed to the picture: a 4-note koi motif on koto and music box that grows into the dragon's theme on brass and choir, birdsong, bamboo knocks, a cat's "mrrp", a heron's call, rain, thunder, the roar of the falls, a heartbeat in the near silence, taiko for the climb, a temple bell at home.
Direction: A tiny hero against huge worlds, macro close-ups on the eye, colour running dawn, day, sunset, storm, dawn.

IT MUST NOT LOOK LIKE
- 3D: No plastic materials, CGI shading, visible polygons or game-engine lighting.
- Blocky shapes: No plain boxes or toy proportions. Everything carries scales, fin rays, feathers or fur.
- SVG or vector art: No perfect curves, uniform outlines or basic gradients.
- Web animation: No sliding layers, bobbing, software easing or puppet joints.
- Pasted-on elements: No 2D sprites floating in a 3D scene.
- AI art: No warped shapes, melted details, flicker or changing designs.
- Non-anime art: No Western cartoon designs or realistic rendering.
- Amateur work: No stiff poses, empty backgrounds, muddy colors or placeholders.

You are free to change any part of the prompt, if it would result in better results.

It should feel small and brave, then enormous and joyful.

Before finishing, inspect random frames as still images. If any frame does not look completely like real 2D anime, keep improving it.

Do not stop until every frame could pass as a still from a theatrical anime film.